Bethesda announced the promotion on their official Twitter account towards the start of June.
The song went live July 4, 2018:
Habitat for Humanity is a global nonprofit housing organization working in local communities across all 50 states and in approximately 70 countries. Habitat works in partnership with families in need of decent and affordable housing. Habitat homeowners help build their own homes alongside volunteers and pay an affordable mortgage.
According to Polygon, the song was made by Copilot Music + Sound, a music production shop based in New York.
Fallout 76 launches on November 14th, 2018, on PlayStation 4, Windows PC and Xbox One.